Energy Spectrum of Secondary Leptons in $e^{+}{e}^{-}\to t\bar{t}$ - Non-standard Interactions and CP Violation -

Abstract

The process of top-quark pair production at future high-energy $e^{+}{e}^{-}$ linear colliders has been investigated as a possible test of physics beyond the Standard Model. Non-standard interactions have been assumed both for the production and for the subsequent decay of the top quarks. The energy spectrum of the single lepton $l^{\pm }$ and the energy correlation of $l^{+}$ and $l^{-}$ emerging from the process $e^{+}{e}^{-}\to t\bar{t}\to l^{\pm }X/l^{+}{l}^{-}X$ are calculated. The energy- spectrum asymmetry of $l^{+}$ and $l^{-}$ is considered as a measure of CP violation. An optimal method to determine whether CP violation occurs in the production or in the decay processes is proposed.

Final version (to appear in Nucl.Phys.B)

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Cited by in corpus (33)

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• Effect of anomalous tbW vertex on decay-lepton distributions in e+e- -> t tbar and CP-violating asymmetries
• Decoupling of Anomalous Top-Quark-Decay Vertices in Angular Distribution of Secondary Particles
• Optimal-Observable Analysis of the Angular and Energy Distributions for Top-Quark Decay Products at Polarized Linear Colliders
• Top effective operators at the ILC
• Angular Distribution of Leptons in General ttbar Production and Decay
• Four-Fermi Effective Operators in Top-Quark Production and Decay
• CP Violation, Top Quarks and the Tevatron Upgrade
• Probing Top-Quark Couplings at Polarized NLC
• Electric dipole moment of top quark and CP-violating asymmetries in gamma gamma -> t tbar
• Testing Top-Quark Yukawa Interactions in e+ e- -> t \bar{t} Z
• Model-independent measurement of the top quark polarisation
• Optimal-Observable Analysis of Possible New Physics Using the b-quark in gamma gamma -> tt -> bX
• Optimal Beam Polarizations for New-Physics Search through gamma gamma -> t tbar -> lX/bX
• CP violation in tbW couplings at the LHC
• Effects of Non-Standard Interactions for the Energy Spectrum of Secondary Leptons in e^+e^- --> t t-bar
• CP violation in e+e- -> t tbar: Energy Asymmetries and Optimal Observables of b and bbar Quarks
• Optimal Spin Basis in Polarized Photon Linear Colliders
• Probe of CP Violation in e+e- -> ttbar Near Threshold
• Polarized Single Top Production at Leptonic Colliders from Broken R Parity Interactions Incorporating CP Violation
• CP-violating dipole form factors of the top quark and tau lepton in scalar leptoquark models
• CP violating asymmetries of b quarks and leptons in e^+e^- \to t\bar t and supersymmetry (review)
• Testing Scalar-Sector CP Violation in Top-Quark Production and Decay at Linear e+e- Colliders
• CP violation flavor asymmetries in slepton pair production at leptonic colliders from broken R parity
• Energy correlation of bottom quarks from decays of top quarks in electron$-$positron annihilation
• Decay-lepton angular distributions in e+e- -> t tbar to O(alpha_s) in the soft-gluon approximation
• Remark on CP-violating Polarization Asymmetry of tt-bar via Anomalous Couplings to gamma and Z
• Energy and angular distributions of the bottom quark in the electron-positron annihilation $e^{+}{e}^{-}\to b{W}^{+}\bar{t}$
• QCD corrections to decay-lepton polar and azimuthal angular distributions in e+e- -> t tbar in the soft-gluon approximation